Mode 8: Two channel vocoder
Mode 8 controls are similar to Mode 6 controls, but because it adds a second voice to the synthesis part, it has a
second set of controls for several functions. In addition, it has settings for determining the interval between the base
note and the second note. And because the intervals have to follow standard keys, the key selection has been added
by pulling up the
key select
switch. Not surprisingly, the default key is C major/A minor.
Quick start guide
Inputs signals:
mic
:
Microphone input, balanced 3.5mm TRS plug
modulation 1
: No function
modulation 2
: No function
envelope inputs
:
envelope
1: base note spectral shift
envelope
2: 2nd note spectral shift
envelope
3: No function
envelope
4: No function (optionally CV note input, if the PCB switch is closed)
Notes: Vocoder is typically used without external envelope modulation; in that case connect all the
envelope inputs
1 - 2 to the
D.C. out
output for enabling the corresponding functions.
Outputs:
Output is normally from the
out
TRS jack.
Adjustments:
adjust 1
: spectral shift for base note (big speaker/small speaker)
adjust 2
: spectral shift for second note (big speaker/small speaker)
Slider 1
: On/off, automatic/manual noise control. If off, or fully down, the noise characteristics can be
adjusted using sliders 2 - 5, otherwise automatic noisiness decision made in the vocoder.
Slider 2
: If Slider 1 is off, adjusts the noise level at the frequency band corresponding to the fundamental,
otherwise adjusts the sensitivity for automatic noise generation for the band.
Slider 3
: Corresponding noise adjustment for harmonics 2&3.
Slider 4
: Corresponding noise adjustment for harmonics 4&5.
Slider 5
: Corresponding noise adjustment for all the remaining harmonics.
Slider 6
: Noise gate: clips the bottom of the analyzed speech spectrum which typically is noisy; increased
clipping also removes lower spectral contents for sound coloring.
Slider 7
: Spectral shaping; exaggerates the differences of spectral peaks and valleys when shifted upwards
from the default off-position.
Slider 8
: Control of the interpolation between the analyzed spectral bands. This is an on-off control and its
change only comes into effect after system reset or mode change. When slider 8 is off at the minimum
position, the interpolation is maximally smooth. This results in decreased spectral resolution, but
minimizes possibly unwanted effects with rapid note changes that vary the spectrum. Pulling slider 8 up
will improve spectral resolution. The audible differences are quite small, though, in most cases.
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